NL50 AK on ugly flop OOP

[StyloAl]

Villain unknown

Party Poker
No Limit Holdem Ring game
Blinds: $0.25/$0.50
6 players
Converter

Stack sizes:
UTG: $48.40
UTG+1: $53.15
CO: $25.30
Button: $37.84
Hero: $62.94
BB: $142.94

Pre-flop: (6 players) Hero is SB with :kc :ad
2 folds, CO calls, Button raises to $2.5, Hero raises to $8.5, 2 folds, Button calls.

Flop: :qs :5s :5h ($18, 2 players)
Hero bets $12, Button calls.

Turn: :6h ($42, 2 players)
Hero?

check/fold?